Single phase fault isolation and restoration with load estimation

A method for controlling a power distribution network, comprising:

• receiving, by an electronic processor, a fault indication associated with a fault in the power distribution network from a first isolation device of a plurality of isolation devices;
• sending, by the electronic processor, a first open command to a downstream isolation device downstream of the fault;
• identifying, by the electronic processor, a tie-in isolation device;
• identifying, by the electronic processor, a first line section without current monitoring positioned between the tie-in isolation device and the downstream isolation device, wherein the first line section has a plurality of line segments, and each line segment has a load rating;
• receiving, by the electronic processor, an incoming current measurement and an exiting current measurement for the first line section;
• estimating, by the electronic processor, a first current load for each of the line segments in the first line section based on the incoming current measurement, the exiting current measurement, and the load ratings of the line segments;
• selecting, by the electronic processor, an intermediate isolation device between the tie-in isolation device and the downstream isolation device based on the first current loads;
• sending, by the electronic processor, a second open command to the intermediate isolation device;
• and
• sending, by the electronic processor, a close command to the tie-in isolation device.